// Guests have no account to list Orders under, so their Order history is
// tracked client-side instead: each placed guest Order's id + access token
// is remembered here so `/orders` can look them back up without a sign-in.
const STORAGE_KEY = 'ghost-kitchen-guest-orders'

export type GuestOrderRef = { orderId: number; guestAccessToken: string }

const isGuestOrderRef = (value: unknown): value is GuestOrderRef =>
  typeof value === 'object' &&
  value !== null &&
  typeof (value as GuestOrderRef).orderId === 'number' &&
  typeof (value as GuestOrderRef).guestAccessToken === 'string'

export const getGuestOrderRefs = (): Array<GuestOrderRef> => {
  try {
    const raw = window.localStorage.getItem(STORAGE_KEY)
    if (!raw) return []
    const parsed: unknown = JSON.parse(raw)
    return Array.isArray(parsed) ? parsed.filter(isGuestOrderRef) : []
  } catch {
    return []
  }
}

export const addGuestOrderRef = (ref: GuestOrderRef) => {
  try {
    const existing = getGuestOrderRefs().filter(
      (stored) => stored.orderId !== ref.orderId,
    )
    window.localStorage.setItem(
      STORAGE_KEY,
      JSON.stringify([ref, ...existing]),
    )
  } catch {
    // Unavailable (private mode, quota) — the order still works via its
    // own link, it just won't show up in the local Orders list.
  }
}